Plug cap
First Claim
1. A plug cap comprising:
- an electrical connection portion that electrically connects a spark plug to a plug cord, the spark plug being connected to one end of the electrical connection portion and the plug cord being connected to an opposite end of the electrical connection portion;
a terminal body that is made of a resin, is provided on an outer periphery of the electrical connection portion, and includes a one end-side insertion portion formed at one end of the terminal body and into which the spark plug is inserted, and an opposite end-side insertion portion formed at an opposite end of the terminal body and into which the plug cord is inserted, at least the one end-side insertion portion and the opposite end-side insertion portion being formed in a cylindrical shape; and
a cylindrical rubber member mounted on at least one of one end portion and an opposite end portion of the terminal body and into which the spark plug or the plug cord is inserted,wherein the rubber member includes;
an inner cylindrical portion inserted into a one end-side insertion portion or the opposite end-side insertion portion of the terminal body,an outer cylindrical portion positioned close to an outer periphery of the inner cylindrical portion and disposed with the terminal body interposed between the outer cylindrical portion and the inner cylindrical portion, anda connecting portion that connects a lower-most portion of the outer cylindrical portion to a portion of the inner cylindrical portion that extends below the lower-most portion of the outer cylindrical portion, andthe inner cylindrical portion includes;
at least one annular protrusion extending radially outward from the inner cylindrical portion and coming into contact with an inner peripheral surface of the terminal body.
1 Assignment
0 Petitions
Accused Products
Abstract
One object of the invention is to provide a plug cap that more reliably prevents the leakage of current by suppressing the ingress of water from a gap between a terminal body and a rubber member.
A plug cap 1 includes an electrical connection portion 5 that electrically connects a spark plug to a plug cord, a terminal body 2 that is provided on the outer periphery of the electrical connection portion 5, and a cylindrical rubber member 3 which is mounted on at least one of one end portion and the other end portion of the terminal body 2 and into which the spark plug or the like is inserted. The terminal body 2 includes a one end-side insertion portion 41 which is formed at one end of the terminal body and into which the spark plug is inserted and the other end-side insertion portion 42 which is formed at the other end of the terminal body and into which the plug cord is inserted. The rubber member 3 includes an inner cylindrical portion 31 that is inserted into the one end-side insertion portion 41 or the other end-side insertion portion 42, and a cylindrical outer cylindrical portion 32 that is positioned close to the outer periphery of the inner cylindrical portion 31. The inner cylindrical portion 31 includes annular protrusions 35 that come into contact with the inner peripheral surface of the terminal body 2.
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Citations
18 Claims
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1. A plug cap comprising:
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an electrical connection portion that electrically connects a spark plug to a plug cord, the spark plug being connected to one end of the electrical connection portion and the plug cord being connected to an opposite end of the electrical connection portion; a terminal body that is made of a resin, is provided on an outer periphery of the electrical connection portion, and includes a one end-side insertion portion formed at one end of the terminal body and into which the spark plug is inserted, and an opposite end-side insertion portion formed at an opposite end of the terminal body and into which the plug cord is inserted, at least the one end-side insertion portion and the opposite end-side insertion portion being formed in a cylindrical shape; and a cylindrical rubber member mounted on at least one of one end portion and an opposite end portion of the terminal body and into which the spark plug or the plug cord is inserted, wherein the rubber member includes; an inner cylindrical portion inserted into a one end-side insertion portion or the opposite end-side insertion portion of the terminal body, an outer cylindrical portion positioned close to an outer periphery of the inner cylindrical portion and disposed with the terminal body interposed between the outer cylindrical portion and the inner cylindrical portion, and a connecting portion that connects a lower-most portion of the outer cylindrical portion to a portion of the inner cylindrical portion that extends below the lower-most portion of the outer cylindrical portion, and the inner cylindrical portion includes; at least one annular protrusion extending radially outward from the inner cylindrical portion and coming into contact with an inner peripheral surface of the terminal body. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A plug cap comprising:
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an electrical connection portion that electrically connects a spark plug to a plug cord, the spark plug being connected to one end of the electrical connection portion and the plug cord being connected to an opposite end of the electrical connection portion; a terminal body made of a resin provided on an outer periphery of the electrical connection portion and including a one end-side insertion portion formed at one end of the terminal body and into which the spark plug is inserted, and an opposite end-side insertion portion formed at an opposite end of the terminal body and into which the plug cord is inserted, at least the one end-side insertion portion and the opposite end-side insertion portion being formed in a cylindrical shape; and a cylindrical rubber member mounted on at least one of one end portion and an opposite end portion of the terminal body and into which the spark plug or the plug cord is inserted, wherein the rubber member includes; an inner cylindrical portion inserted into a one end-side insertion portion or the opposite end-side insertion portion of the terminal body, an outer cylindrical portion positioned close to an outer periphery of the inner cylindrical portion and disposed with the terminal body interposed between the outer cylindrical portion and the inner cylindrical portion, and a connecting portion that connects a lower-most portion of the outer cylindrical portion to a portion of the inner cylindrical portion that extends below the lower-most portion of the outer cylindrical portion, and the inner cylindrical portion includes; two annular protrusion extending radially outward from the inner cylindrical portion that come into contact with an inner peripheral surface of the terminal body. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A plug cap comprising:
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an electrical connection portion that electrically connects a spark plug to a plug cord, the spark plug being connected to one end of the electrical connection portion and the plug cord being connected to an opposite end of the electrical connection portion; a terminal body made of a resin is provided on an outer periphery of the electrical connection portion and includes a one end-side insertion portion formed at one end of the terminal body and into which the spark plug is inserted, and an opposite end-side insertion portion formed at an opposite end of the terminal body and into which the plug cord is inserted, at least the one end-side insertion portion and the opposite end-side insertion portion being formed in a cylindrical shape; and a cylindrical rubber member mounted on at least one of one end portion and an opposite end portion of the terminal body and into which the spark plug or the plug cord is inserted, wherein the rubber member includes; an inner cylindrical portion inserted into a one end-side insertion portion or the opposite end-side insertion portion of the terminal body, an outer cylindrical portion positioned close to an outer periphery of the inner cylindrical portion and disposed with the terminal body interposed between the outer cylindrical portion and the inner cylindrical portion, and a connecting portion that connects a lower-most portion of the outer cylindrical portion to a portion of the inner cylindrical portion that extends below the lower-most portion of the outer cylindrical portion, and the inner cylindrical portion includes; at least one annular protrusion extending radially outward from the inner cylindrical portion and coming into contact with an inner peripheral surface of the terminal body, and at least one of the annular protrusions extending radially outward is arranged directly facing an annular engaged portion formed on the inner peripheral surface at the lower-most portion of the inner cylindrical portion of the rubber member. - View Dependent Claims (14, 15, 16, 17, 18)
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Specification